Preparation method of double epoxy compound crosslinking agent modified xanthan gum

A technology of diepoxy compound and xanthan gum, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as human or environmental hazards, toxicity, etc., to reduce the amount of crosslinking agent, product safety, and stickiness The effect of increased resilience and network structure

Active Publication Date: 2020-05-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of these cross-linking agents are toxic, for example, glutaraldehyde contains aldehyde groups, 1,6-hexamethylenediamine and hexanediol hydrazine contain amino groups, and epichlorohydrin belongs to 2A carcinogens, etc. These factors will affect the human body or the environment. cause harm

Method used

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  • Preparation method of double epoxy compound crosslinking agent modified xanthan gum
  • Preparation method of double epoxy compound crosslinking agent modified xanthan gum
  • Preparation method of double epoxy compound crosslinking agent modified xanthan gum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1, dissolving 2g of xanthan gum in 100mL of deionized water, stirring slowly at room temperature for 6h to fully dissolve the xanthan gum to obtain a xanthan gum solution;

[0036] Step 2, add 1mol / L NaOH solution to adjust the pH of the above xanthan gum solution to 10, then add dropwise 0.02g of 1.4-butanediol diglycidyl ether as a crosslinking agent, and stir evenly, then heat up the water bath to 40°C for reaction 4h;

[0037] Step 3, the reaction product was settled with 80% ethanol solution, filtered and washed three times with absolute ethanol, and finally dried in a blast drying oven at 60°C to obtain modified xanthan gum, numbered as No. 1 in Table 1. .

Embodiment 2

[0039] As in Example 1, but in step 2, the pH of the solution was adjusted to 11, the mass of 1.4-butanediol diglycidyl ether was added dropwise to 0.06 g, the reaction time was 6 h, and the number was No. 2 in Table 1.

Embodiment 3

[0041] As in Example 1, but in step 2, the pH of the solution was adjusted to 11, the reaction time was 8 hours, the mass of 1.4-butanediol diglycidyl ether was added dropwise to 0.1 g, and the number was No. 3 in Table 1.

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Abstract

The invention discloses a preparation method of a double epoxy compound crosslinking agent modified xanthan gum. The preparation method comprises the following steps: taking water as a solvent and a double epoxy compound as a crosslinking agent, and modifying xanthan gum to obtain the double epoxy crosslinking agent modified xanthan gum. Compared with non-modified xanthan gum, the viscosity and the viscoelastic property of a solution of the double epoxy crosslinking agent modified xanthan gum are remarkably improved, and when the double epoxy crosslinking agent modified xanthan gum is used asfracturing fluid, on one hand, the use amount can be greatly reduced, and on the other hand, the viscoelastic property of the fracturing fluid can be improved, so that the purposes of reducing the cost and improving the efficiency are achieved.

Description

technical field [0001] The invention relates to a preparation method of xanthan gum modified by a diepoxy compound crosslinking agent, and belongs to the technical field of polymer material modification and thickener. Background technique [0002] Xanthan gum, also known as xanthan gum, xanthan gum, xanthomonas polysaccharide, etc., is an exopolysaccharide secreted by Xanthomonas campetris. Xanthan gum is a heteropolysaccharide with the main structure For repeating pentosan units: the molar ratio of two glucose units, two mannose units and one glucuronic acid unit is 2.8 / 2.0 / 2.0. The chemical structure of the main chain of xanthan gum is the same as that of cellulose, and the mannose at the end of the side chain is connected with pyruvate. The primary structure of xanthan gum molecule is composed of the main chain formed by the glucose groups connected by β-1,4 bonds, and the trisaccharide side chains alternately connected with mannose and glucuronic acid. [0003] Xanthan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/02C08J3/24C08L5/02C09K8/68C09K8/90
CPCC08B37/0033C08J3/24C08J2305/02C09K8/68C09K8/90
Inventor 倪才华王刚张丽萍刘仁
Owner JIANGNAN UNIV
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